<table class="ControlTable" border="1">
  <tbody>
    <tr>
      <td class="TextFormat">
        <%= submit_tag 'Acessar',  { :class => 'CommandButton IconConfirm' } %>
        <%= button_to_action 'Voltar', :index, {} , { :class => 'CommandButton IconReturn' } %>
      </td>
    </tr>
  </tbody>
</table>